"The allegations involve a production from Entertainment One," the network said. "In late June, eOne made us aware and informed us that they launched an investigation that is ongoing. The safety of working environments is a top priority for us, and we take this matter very seriously."

Entertainment One, in a statement of its own, said it takes Williamson's claims seriously. "We have initiated an independent investigation which is ongoing and as such, it would be inappropriate to comment at this time," the production company said.

A representative for Williamson didn't respond to messages seeking further details on the actress's claims, or whether the alleged sexual assault was reported to the police.

Williamson, who is African American, was also highly critical of how her claims were handled by showrunner and executive producer Alexi Hawley, who is white. Williamson said she filed reports on the incidents to Hawley, but they weren't seriously investigated by the network or shared by Hawley with other producers.

"After my initial report of sexual harassment, I was assured that the actor would be fired," said Williamson of the guest star. "I was also asked to film with him the very next day as a courtesy to the script, even though we had not begun filming the episode yet."